Definition of ex improviso in English:

ex improviso

adverb

  • Unexpectedly, suddenly, without warning. In later use chiefly in legal contexts.

Origin

Early 16th century. From classical Latin ex imprōvīsō suddenly, unexpectedly from ex + imprōvīsō, ablative of imprōvīsum, use as noun of neuter of imprōvīsus.

Pronunciation

ex improviso

/ˌɛks ɪmprəˈvʌɪzəʊ/